Bud moth

The adult moth has a wingspan of approximately 12–15 mm. Its forewings are mottled with shades of gray and brown, providing excellent camouflage against tree bark.

Larvae, or caterpillars, undergo several developmental stages, eventually featuring a shiny dark head and a body that changes color as they grow to maturity.

As a member of the Tortricidae family, this moth species shares typical characteristics, such as rolling leaves and binding them with silk to create protective shelters.

Spilonota lechriaspis is specifically recognized for its preference for buds, which makes it a distinctive pest compared to other general leaf-rolling species.

Correct identification is essential during the early spring stage when monitoring efforts are focused on the development of flower and vegetative buds.

This pest primary attacks fruit trees, including apples, pears, cherries, and plums. The larvae target buds, which can lead to severe losses in fruit production.

By consuming the internal tissues of developing buds, the larvae prevent the tree from producing fruit or healthy new growth, causing significant economic damage.

In cases of high infestation, the larvae can destroy a large portion of the potential crop, leading to stunted shoot growth and weakened tree structure.

Damage to young nursery trees is particularly critical, as the destruction of primary buds can negatively affect the future shape and vitality of the tree.

The feeding activity creates open wounds on the plant, which serve as entry points for various fungal and bacterial infections.

Overwintered larvae emerge from their silk cocoons in crevices and under bark as soon as temperatures rise and buds begin to swell.

The peak feeding period occurs in early spring, synchronized with the budding and flowering phases, making this the most important time for monitoring and control.

Pupation typically occurs within folded or webbed leaves during the late spring, after which the adult moths emerge to mate and lay eggs.

The life cycle is generally univoltine, meaning one generation per year, with the new larvae entering diapause as winter approaches.

Effective management requires targeting the larvae before they burrow too deeply into the developing buds or establish protected webbed shelters.

One of the earliest signs of a bud moth presence is the appearance of damaged buds that fail to open or show signs of interior feeding.

Webbing between adjacent buds and leaves is a clear indicator that larvae are active and constructing protective nests on the tree branches.

Frass (larval droppings) near the base of buds is a diagnostic sign, confirming the presence of caterpillars despite their secretive feeding habits.

Deformed leaves and stunted shoot tips, often bound together by silk threads, are easily observed during routine spring orchard inspections.

• Webbed clusters of buds and leaves.
• Hollowed-out buds with signs of entry.
• Stunted and deformed new shoot growth.

Early spring insecticide applications during the green tip stage are highly effective in controlling the larvae as they emerge from dormancy.

Orchard sanitation, including the removal of dead bark and cleaning branch crevices, helps to destroy overwintering sites for the larvae.

Biological control agents, such as microbial insecticides based on Bacillus thuringiensis, can be used to manage infestations while preserving beneficial insects.

Pheromone traps are useful tools for monitoring adult moth populations, allowing growers to time their control measures with greater precision.

Promoting natural predators like birds and beneficial wasps can contribute significantly to the long-term suppression of bud moth populations in the orchard.